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Finding the Fourth Proportional to 393,493.10, 551,940.10 and 393,493.10

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Solution

The fourth proportional to 393,493.10, 551,940.10 and 393,493.10 is: 551,940.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,493.10 : 551,940.10 = 393,493.10 : x
  2. Step 2: Convert to fraction form
    393,493.10/551,940.10 = 393,493.10/x
  3. Step 3: Cross multiply
    393,493.10x = 551,940.10 × 393,493.10
  4. Step 4: Simplify right side
    393,493.10x = 217,184,620,963.31
  5. Step 5: Solve for x
    x = 217,184,620,963.31/393,493.10
  6. Step 6: Final answer
    x = 551,940.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.